The injected contrast is clear and mostly is eliminated by your kidneys.

The oral contrast is either clear or white.
Black stool could be from bleeding, possibly from your stomach or proximal small bowel.
See your health care provider asap!

In brief:
No but see your doc!

The injected contrast is clear and mostly is eliminated by your kidneys.

The oral contrast is either clear or white.
Black stool could be from bleeding, possibly from your stomach or proximal small bowel.
See your health care provider asap!
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